3969523 has 4 divisors (see below), whose sum is σ = 3981640. Its totient is φ = 3957408.

The previous prime is 3969503. The next prime is 3969527. The reversal of 3969523 is 3259693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3259693 = 919 ⋅3547.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3969523 is a prime.

It is a super-2 number, since 2×3969523² = 31514225695058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3969527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5553 + ... + 6226.

It is an arithmetic number, because the mean of its divisors is an integer number (995410).

Almost surely, 2^3969523 is an apocalyptic number.

3969523 is a deficient number, since it is larger than the sum of its proper divisors (12117).

3969523 is a wasteful number, since it uses less digits than its factorization.

3969523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12116.

The product of its digits is 43740, while the sum is 37.

The square root of 3969523 is about 1992.3661812026. The cubic root of 3969523 is about 158.3359167322.

The spelling of 3969523 in words is "three million, nine hundred sixty-nine thousand, five hundred twenty-three".